Add authType to loginWithBrowser metrics (#877)

## Problem
Users can signin with the device code or PKCE flow
## Solution
This metric adds the type of auth flow/token flow to the
aws_loginWithBroswer metric
<!---
    REMINDER:
    - Read CONTRIBUTING.md first.
    - Add test coverage for your changes.
    - Link to related issues/commits.
    - Testing: how did you test your changes?
    - Screenshots if applicable
-->

## License

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Author: manodnyab

telemetry/definitions/commonDefinitions.json

@@ -132,6 +132,17 @@
             ],
             "description": "Status of the an auth connection."
         },
+        {
+            "name": "authType",
+            "type": "string",
+            "allowedValues": [
+                "PKCE",
+                "DeviceCode",
+                "IAM",
+                "Unknown"
+            ],
+            "description": "The type of auth flow used for signing in"
+        },
         {
             "name": "awsAccount",
             "type": "string",
@@ -2813,6 +2824,10 @@
             "name": "aws_loginWithBrowser",
             "description": "Extension navigated the user to a web browser to perform/complete the login process.",
             "metadata": [
+                {
+                    "type": "authType",
+                    "required": false
+                },
                 {
                     "type": "credentialSourceId",
                     "required": false